public class Computer {
    private String cpu; // cpu
    private String memory; // 内存
    public String screen; // 屏幕
    String brand; // 品牌---->default属性

    public String getCpu() {
        return cpu;
    }

    public void setCpu(String cpu) {
        this.cpu = cpu;
    }

    public Computer(String cpu, String memory, String screen, String brand) {
        this.cpu = cpu;
        this.memory = memory;
        this.screen = screen;
        this.brand = brand;
    }

    public void Boot(){
        System.out.println("开机~~~");
    }
    public void PowerOff(){
        System.out.println("关机~~~");
    }
    public void SurfInternet(){
        System.out.println("上网~~~");
    }
}


